Go to this place here: http://zeropaid.com/
It will give you all the information that you need for chooseing the best P2P Application for you.
You can choose between windows/Mac/or Linux.
the choice is yours.

Um...I am going to take a shot in the dark on this one, but have you looked at the other threads on the Filesharing Forum. There are about 6 of the regarding the best p2p out there. I am not sure if you knew that or not, but this has been debated more times than not, and you are going to get the same answers here, as the same answers were given in the other threads.